A lower limit for Newtonian-noise models of the Einstein Telescope Jan Harms, Luca Naticchioni, Enrico Calloni, Rosario De Rosa, Fulvio Ricci and Domenico D’Urso Eur. Phys. J. Plus, 137 6 (2022) 687 Published online: 13 June 2022 DOI: 10.1140/epjp/s13360-022-02851-z